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fix 'attempt to index a nil value (global self)'
[etc/awesome.git] / widgets / bat.lua
diff --git a/widgets/bat.lua b/widgets/bat.lua
index 60bd71cd581c56965621b7fbc43c4366ead168b9..8b62790104d287aa514cb556c707083e2493be0a 100644 (file)
--- a/widgets/bat.lua
+++ b/widgets/bat.lua
@@ -1,149 +1,182 @@
 
 --[[
 
 --[[
-                                                  
-     Licensed under GNU General Public License v2 
-      * (c) 2013,      Luke Bonham                
-      * (c) 2010-2012, Peter Hofmann              
-                                                  
+                                                                                                                       
+        Licensed under GNU General Public License v2 
+         * (c) 2013,      Luke Bonham                
+         * (c) 2010-2012, Peter Hofmann              
+                                                                                                                       
 --]]
 
 --]]
 
-local newtimer     = require("lain.helpers").newtimer
 local first_line   = require("lain.helpers").first_line
 local first_line   = require("lain.helpers").first_line
-
+local make_widget  = require("lain.helpers").make_widget_textbox
+local newtimer     = require("lain.helpers").newtimer
 local naughty      = require("naughty")
 local wibox        = require("wibox")
 local naughty      = require("naughty")
 local wibox        = require("wibox")
-
-local math         = { floor  = math.floor }
+local math         = { abs    = math.abs,
+                       floor  = math.floor,
+                       log10  = math.log10,
+                       min    = math.min }
 local string       = { format = string.format }
 local string       = { format = string.format }
+local ipairs       = ipairs
+local type         = type
 local tonumber     = tonumber
 local tonumber     = tonumber
-
 local setmetatable = setmetatable
 
 -- Battery infos
 -- lain.widgets.bat
 
 local function worker(args)
 local setmetatable = setmetatable
 
 -- Battery infos
 -- lain.widgets.bat
 
 local function worker(args)
-    local bat = {}
-    local args = args or {}
-    local timeout = args.timeout or 30
-    local battery = args.battery or "BAT0"
-    local notify = args.notify or "on"
-    local settings = args.settings or function() end
-
-    bat.widget = wibox.widget.textbox('')
+    local bat       = make_widget()
+    local args      = args or {}
+    local timeout   = args.timeout or 30
+    local batteries = args.batteries or (args.battery and {args.battery}) or {"BAT0"}
+    local ac        = args.ac or "AC0"
+    local notify    = args.notify or "on"
+    local settings  = args.settings or function() end
 
     bat_notification_low_preset = {
 
     bat_notification_low_preset = {
-        title = "Battery low",
-        text = "Plug the cable!",
+        title   = "Battery low",
+        text    = "Plug the cable!",
         timeout = 15,
         timeout = 15,
-        fg = "#202020",
-        bg = "#CDCDCD"
+        fg      = "#202020",
+        bg      = "#CDCDCD"
     }
 
     bat_notification_critical_preset = {
     }
 
     bat_notification_critical_preset = {
-        title = "Battery exhausted",
-        text = "Shutdown imminent",
+        title   = "Battery exhausted",
+        text    = "Shutdown imminent",
         timeout = 15,
         timeout = 15,
-        fg = "#000000",
-        bg = "#FFFFFF"
+        fg      = "#000000",
+        bg      = "#FFFFFF"
     }
 
     }
 
-    function update()
-        bat_now = {
-            status = "Not present",
-            perc   = "N/A",
-            time   = "N/A",
-            watt   = "N/A"
-        }
-
-        local bstr  = "/sys/class/power_supply/" .. battery
-
-        local present = first_line(bstr .. "/present")
-
-        if present == "1"
-        then
-            local rate  = first_line(bstr .. "/power_now") or
-                          first_line(bstr .. "/current_now")
-
-            local ratev = first_line(bstr .. "/voltage_now")
-
-            local rem   = first_line(bstr .. "/energy_now") or
-                          first_line(bstr .. "/charge_now")
-
-            local tot   = first_line(bstr .. "/energy_full") or
-                          first_line(bstr .. "/charge_full")
-
-            bat_now.status = first_line(bstr .. "/status") or "N/A"
+    bat_now = {
+        status    = "N/A",
+        ac_status = "N/A",
+        perc      = "N/A",
+        time      = "N/A",
+        watt      = "N/A"
+    }
 
 
-            rate  = tonumber(rate) or 1
-            ratev = tonumber(ratev)
-            rem   = tonumber(rem)
-            tot   = tonumber(tot)
+    bat_now.n_status = {}
+    bat_now.n_perc   = {}
+    for i = 1, #batteries do
+        bat_now.n_status[i] = "N/A"
+        bat_now.n_perc[i] = 0
+    end
 
 
-            local time_rat = 0
-            if bat_now.status == "Charging"
-            then
-                time_rat = (tot - rem) / rate
-            elseif bat_now.status == "Discharging"
-            then
-                time_rat = rem / rate
+    function bat.update()
+        local sum_rate_current = 0
+        local sum_rate_voltage = 0
+        local sum_rate_power   = 0
+        local sum_rate_energy  = 0
+        local sum_energy_now   = 0
+        local sum_energy_full  = 0
+        local pspath           = "/sys/class/power_supply/"
+
+        for i, battery in ipairs(batteries) do
+            local bstr    = pspath .. battery
+            local present = first_line(bstr .. "/present")
+
+            if tonumber(present) == 1 then
+                -- current_now(I)[uA], voltage_now(U)[uV], power_now(P)[uW]
+                local rate_current = tonumber(first_line(bstr .. "/current_now"))
+                local rate_voltage = tonumber(first_line(bstr .. "/voltage_now"))
+                local rate_power   = tonumber(first_line(bstr .. "/power_now"))
+
+                -- energy_now(P)[uWh], charge_now(I)[uAh]
+                local energy_now        = tonumber(first_line(bstr .. "/energy_now") or
+                                          first_line(bstr .. "/charge_now"))
+
+                -- energy_full(P)[uWh], charge_full(I)[uAh]
+                local energy_full       = tonumber(first_line(bstr .. "/energy_full") or
+                                          first_line(bstr .. "/charge_full"))
+
+                local energy_percentage = tonumber(first_line(bstr .. "/capacity")) or
+                                          math.floor((energy_now / energy_full) * 100)
+
+                bat_now.n_status[i] = first_line(bstr .. "/status") or "N/A"
+                bat_now.n_perc[i]   = energy_percentage or bat_now.n_perc[i]
+
+                sum_rate_current = sum_rate_current + (rate_current or 0)
+                sum_rate_voltage = sum_rate_voltage + (rate_voltage or 0)
+                sum_rate_power   = sum_rate_power + (rate_power or 0)
+                sum_rate_energy  = sum_rate_energy + (rate_power or (((rate_voltage or 0) * (rate_current or 0)) / 1e6))
+                sum_energy_now   = sum_energy_now + (energy_now or 0)
+                sum_energy_full  = sum_energy_full + (energy_full or 0)
             end
             end
+        end
 
 
-            local hrs = math.floor(time_rat)
-            if hrs < 0 then hrs = 0 elseif hrs > 23 then hrs = 23 end
-
-            local min = math.floor((time_rat - hrs) * 60)
-            if min < 0 then min = 0 elseif min > 59 then min = 59 end
-
-            bat_now.time = string.format("%02d:%02d", hrs, min)
-                       
-                       local perc = tonumber(first_line(bstr .. "/capacity"))                  
-
-            if not perc then
-                          perc = (rem / tot) * 100
-                       end
-                       
-                       if perc <= 100 then
-                          bat_now.perc = string.format("%d", perc)
-                       elseif perc > 100 then
-                          bat_now.perc = "100"
-                       elseif perc < 0 then
-                          bat_now.perc = "0"
-                       end
-               
-            if rate ~= nil and ratev ~= nil then
-                bat_now.watt = string.format("%.2fW", (rate * ratev) / 1e12)
-            else
-                bat_now.watt = "N/A"
+        -- When one of the battery is charging, others' status are either
+        -- "Full", "Unknown" or "Charging". When the laptop is not plugged in,
+        -- one or more of the batteries may be full, but only one battery
+        -- discharging suffices to set global status to "Discharging".
+        bat_now.status = bat_now.n_status[1]
+        for _,status in ipairs(bat_now.n_status) do
+            if status == "Discharging" or status == "Charging" then
+                bat_now.status = status
+            end
+        end
+        bat_now.ac_status = tonumber(first_line(string.format("%s%s/online", pspath, ac))) or "N/A"
+
+        if bat_now.status ~= "N/A" then
+            if bat_now.status ~= "Full" and sum_rate_power == 0 and bat_now.ac_status == 1 then
+                                                               bat_now.perc  = math.floor(math.min(100, (sum_energy_now / sum_energy_full) * 100))
+                                                               bat_now.time  = "00:00"
+                                                               bat_now.watt  = 0
+
+            -- update {perc,time,watt} iff battery not full and rate > 0
+            elseif bat_now.status ~= "Full" then
+                local rate_time = 0
+                -- Calculate time and watt if rates are greater then 0
+                if (sum_rate_power > 0 or sum_rate_current > 0) then
+                    local div = (sum_rate_power > 0 and sum_rate_power) or sum_rate_current
+
+                    if bat_now.status == "Charging" then
+                        rate_time = (sum_energy_full - sum_energy_now) / div
+                    else -- Discharging
+                        rate_time = sum_energy_now / div
+                    end
+
+                    if 0 < rate_time and rate_time < 0.01 then -- check for magnitude discrepancies (#199)
+                        rate_time_magnitude = math.abs(math.floor(math.log10(rate_time)))
+                        rate_time = rate_time * 10^(rate_time_magnitude - 2)
+                    end
+                 end
+
+                local hours   = math.floor(rate_time)
+                local minutes = math.floor((rate_time - hours) * 60)
+                bat_now.perc  = math.floor(math.min(100, (sum_energy_now / sum_energy_full) * 100))
+                bat_now.time  = string.format("%02d:%02d", hours, minutes)
+                bat_now.watt  = tonumber(string.format("%.2f", sum_rate_energy / 1e6))
+            elseif bat_now.status == "Full" then
+                bat_now.perc  = 100
+                bat_now.time  = "00:00"
+                bat_now.watt  = 0
             end
             end
-
         end
 
         widget = bat.widget
         settings()
 
         -- notifications for low and critical states
         end
 
         widget = bat.widget
         settings()
 
         -- notifications for low and critical states
-        if bat_now.status == "Discharging" and notify == "on" and bat_now.perc ~= nil
-        then
-            local nperc = tonumber(bat_now.perc) or 100
-            if nperc <= 5
-            then
+        if notify == "on" and type(bat_now.perc) == "number" and bat_now.status == "Discharging" then
+            if bat_now.perc <= 5 then
                 bat.id = naughty.notify({
                     preset = bat_notification_critical_preset,
                 bat.id = naughty.notify({
                     preset = bat_notification_critical_preset,
-                    replaces_id = bat.id,
+                    replaces_id = bat.id
                 }).id
                 }).id
-            elseif nperc <= 15
-            then
+            elseif bat_now.perc <= 15 then
                 bat.id = naughty.notify({
                     preset = bat_notification_low_preset,
                 bat.id = naughty.notify({
                     preset = bat_notification_low_preset,
-                    replaces_id = bat.id,
+                    replaces_id = bat.id
                 }).id
             end
         end
     end
 
                 }).id
             end
         end
     end
 
-    newtimer(battery, timeout, update)
-
+    newtimer("batteries", timeout, bat.update)
+    
     return setmetatable(bat, { __index = bat.widget })
 end
 
     return setmetatable(bat, { __index = bat.widget })
 end
 
awesome window-manager configuration

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